package com.sky.service.impl;

import com.alibaba.fastjson.JSONObject;
import com.google.gson.JsonObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
@Slf4j
public class UserServiceImpl implements UserService {
    public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";
    @Autowired
    UserMapper userMapper;
    @Autowired
    private WeChatProperties weChatProperties;
    /**
     * 微信登录
     * @param userLoginDTO
     * @return
     */
    public User wxLogin(UserLoginDTO userLoginDTO) {
        //调用微信接口，获取微信用户信息
        JSONObject jsonObject = getJsonObject(userLoginDTO);
        String openid = jsonObject.getString("openid");
        //判断openid是否为空
        if (openid == null){
            log.error("微信登录失败，openid为空");
            throw new RuntimeException(MessageConstant.LOGIN_FAILED);
        }
        //判断数据库是否存在该用户
        User user = userMapper.getByOpenid(openid);
        //不存在，自动注册到数据库中，返回用户信息
        if (user == null){
            user = User.builder().openid(openid).createTime(LocalDateTime.now()).build();
            userMapper.insert(user);
        }
        //存在，返回用户信息
        return user;
    }

    private JSONObject getJsonObject(UserLoginDTO userLoginDTO) {
        Map< String, String>  map = new HashMap<>();
        map.put("appid", weChatProperties.getAppid());
        map.put("secret", weChatProperties.getSecret());
        map.put("js_code", userLoginDTO.getCode());
        map.put("grant_type", "authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN, map);

        JSONObject jsonObject = JSONObject.parseObject(json);
        return jsonObject;
    }
}
